Balancing selection and the crossing of fitness valleys in structured populations: diversification in the gametophytic self-incompatibility system.

Abstract excerpt

The self-incompatibility locus (S-locus) of flowering plants displays a striking allelic diversity. How such a diversity has emerged remains unclear. In this article, we performed numerical simulations in a finite island population genetics model to investigate how population subdivision affects the diversification process at a S-locus, given that the two-gene architecture typical of S-loci involves the crossing...

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